Azuko, who lost her mother when she was a child, begins working as a new servant in the palace. However, because she sees supernatural creatures, she is secretly called the 'Lady of the Mysterious' and becomes the target of gossip. Meanwhile, courtiers fail to show up for their duties, claiming to have been victims of strange phenomena. Desperate to avoid further negative rumors, Azuko tries to stay away from the supernatural… until she is accidentally drawn into an investigation by the handsome and influential nobleman Kōei, the emperor's confidant. The problem? Kōei is a dangerous figure, surrounded by scandalous rumors of being the greatest womanizer in the court!?